CHEM H90 Lecture Notes - Lecture 11: Unpaired Electron, Bond Length, Octet Rule
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Formal charge: hcn: arrange remaining electrons to satisfy the duet rule for h and the octet rule for c, n, o, and f, check whether the molecule has formal charges. Formal charge: co: carbon has 4 electrons, oxygen has 6 electrons, 4 + 6 = 10. Clicker quiz: thiocyanate [scn]-1 can have the negative formal charge on two of the three atoms it contains. Make your lewis structure to find out which two: sulfur and nitrogen. 2: find the lewis structure of cho- 2: total valence electrons: 4 + 1 + (2 x 6, formal charges, o: 6 7 = -1, o: 6 6 = 0, c: 4 4 = 0. Is this charge always residing in one specific o atom: no, there is a resonance. Formal charge and stability: carbonate: write the formal charges of the carbonate ion. Exceptions to the octet rule: octet rule applies mainly to second period elements, for other elements, many exceptions exist, due to:
